Recent content by Zahra G

I would like to know that if my Green function was nonzero in almost energies (because the energy interval is from -infinity to infinity) is it necessary that I have zero padding? Another question is that when I use the FFT without zero padding, my function goes to high orders. For example, if...

Thank you.

I tried and I wanted to be sure that using fft command is true for non-periodic function like Green function or not?

Hi everybody. I have a (1×N) Green function in MATLAB. I want to use the FFt function for Green function to transform the time domain. Does the FFT command work correctly for Green function using: A=fft(Green function, nfft). Here nfft is the number of transformed points. Is it necessary that...

I defined zero matrix with zeros command in the binging of the program and calculate the Green function in energy domain then I converted the Green function to periodic function using for loop. Is it true=?

I have a 1×N Green function in energy domain. I want to use the FFT (fast Fourier transform) for this Green function in MATLAB. But this function is non-periodic. Could you help me about this? How can I change the energy interval to convert Green function as a periodic function?